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Treatment of acrylic fiber wastewater by anoxic/oxic sequencing batch membrane bioreactor
Authors： WEI Jian1,2,Fan Dongqi2,3,SONG Yonghui1,2*, KONG Minghao1,2,ZENG Ping1,2, XU Dongyao3
Units： 1. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China；2. Department of Urban Water Environmental Research, Chinese Research Academy of Environmental Sciences, Beijing 100012, China；3. College of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 10083, China
KeyWords： acrylic fiber wastewater; membrane bioreactor (MBR); activated sludge; membrane fouling; wastewater treatment
ClassificationCode：X703
year,volume(issue):pagination： 2016,36(2):108-114

Abstract：
 An anoxic/oxic sequencing batch membrane bioreactor (SBMBR) was used for the treatment of acrylic fiber wastewater. The removal efficiencies of COD, NH4+-N and TN of the acrylic fiber wastewater by SBMBR in different operational conditions were investigated. The microorganism in activated sludge of the SBMBR system and membrane fouling were also analyzed. The results showed that SBMBR had high removal efficiency on pollutants in acrylic fiber wastewater, and the water quality of the effluent was stable. Under the designed operation conditions of 90 min anoxic/150 min aerobic cyclic operation and HRT of 24 h, the average COD, NH4+-N and TN removal efficiencies were 82.5%, 98.7% and 74.6%, respectively. The effluent of the SBMBR could steadily meet the National Discharge Standard of China of Grade I (GB8978-1996). The lacking of carbon source and alkalinity were the main limiting factors for nitrogen removal, and the addition of carbon source and alkalinity were conducive to improving nitrogen removal efficiency. Filamentous bacteria, bacillus and coccus were the main microorganisms in SBMBR system, and filamentous bacteria were the dominant microorganism under the low C/N ratio condition. The PVDF flat membrane showed high anti-fouling ability, and the membrane flux could be almost fully recovered after physical cleaning.

Funds：
国家水体污染控制与治理科技重大专项（No.2012ZX07202-002,2012ZX07202-005）

AuthorIntro：
作者简介：魏健(1983-),男,安徽阜阳人，博士,主要研究方向为难降解工业废水处理技术,E-mail: weijian0911@163.com 通讯作者,E-mail: songyh@craes.org.cn

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